Riveting-machine.



Patented May 7, (am.

2 ShaetsShoat I.

J. H. ALLEN.

BIVETING MACHINE.

(Application filed Mar. 8, 1901.)

III II" No. 673,63l.

(NS Model.)

INVENTOR URNEY WITNESSES: 4Q if/1&6??

No. 673,631. Patented May 7, I90].

' H. ALLEN. BIVETING MACHlNE.

(Apph t n fildM 6 1901] 2 Sheets-Sheet 2.

(No Model.)

0/ HMNSMM 7 l Ila-Ml w r a INVENTOR BY J WITNESSES: 9 @fllfl ro z)TORNEY EFIcE.

PATENT JOHN H. ALLEN, OF NEW YORK, N. Y.

RlVETlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 673,631, dated May 7,1901.

Application filed March 6, 1901. Serial No. 501097. (No model.)

To etZZ whom it may concern:

Be it known that I, JOHN H. ALLEN, a citizen of the United States, and aresident of the borough of Bronx, city of New York, State of New York,have invented new and useful Improvements in Riveting-Machines, of whichthe following is a specification, reference being had to theaccompanying drawings, forming part thereof.

My invention relates to riveting-machines, and particularly toimprovements in that type of riveting-machines known in the trade asAllen riveters.

My invention consists in improvements in the link connections betweenthe movable riveting-head and the power member of the operating-engineand it consists particularly in providing the compression-link memberwith integral trunnions adapted to receive the ends of tension-linkmembers employed, in providing a central pin through the compressionmember axially in a line with the trunnions, in providing a cross-headwhich is arranged in a cut-away portion of the compression-link memberand pivotally mounting the same upon the central pin, and in certaindetails of construction and combination of parts, as hereinafter morefully set forth, and as illustrated in the drawings herewith.

The objects of my invention are to improve the construction and increasethe efficiency of a riveting-machine of this type, to lessen the cost ofmanufacture while increasing the strength and durability thereof, andgenerally to improve the operation while lightening and simplifying theparts.

I will now proceed to describe a rivetingmachine embodying my inventionand will then point out the novel features in claims.

In the drawings which form a part of this specification, Figure 1 is aview in side elevation of a riveting-machine embodying my invention.Fig. 2 is a view in detail of certain link members employed and certaincorrelated parts, partially in side elevation and partly in centrallongitudinal section. Fig. 3 is a view of substantially the same parts,but taken from a point at right angles to the point of View of Fig. 2.Fig. tis a detail sectional view of certain parts, the section beand amovable riveting-head c, an operatingengine d, and link connectionsbetween the movable riveting-head c and the operatingengine. The linkconnections comprise a compression-link member 6 and two tensionlinkmembers f f.

The movable riveting-head c has a plunger g, which is slidably mountedin a sleeve carried by or forming a part of the yoke or frame a. Theplunger 9 is provided with a thrustblock it, and one end of thecompression-link member 8 bears against this thrust-block and ispivotally connected to the plunger by a pin 2'. The pin 4 is preferablyloosely fitted in an orifice in the link member 6, so that when the linkmember is operating to force the plunger forwardly the link member maybear against and be wholly supported by the thrust-block h, while uponits return movement the link may withdraw the plunger by reason of thepivot-pin connection therewith. The opposite end of the compression-linkmember e has a cut-away portion j, which receives within it a cross-headk, with which the connectingrod of the operating-engine is provided. Acentral pivot-pin Z connects the cross-head and the compression-linkmember together, and the cross-head is provided with a thrustbearingcontiguous to the cut-away portion of the link member. The compression-link member 6 is provided on opposite sides thereof withintegral trunnions m, which are concentric with the pivot-pin Z.Trunnions n are provided upon the frame or yoke a, which project fromthe sides of the sleeve thereon, and the tension-link members f f areeach pivotally supported at one end by and upon one of theframe-trunnions n and at the other end thereof by and upon one of thetrunnions m of the compression-link member. It follows from thisconstruction that when power is applied to straighten or aline the linkmembers for the purpose of riveting the great strain between them iscarried by the trunnion of the compression member and not by thepivotpin Z. The pivot-pin Z may therefore be of small diameter, for itsonly work will be to hold the parts together When not in operation andto assist in returning the parts to their normal positions.

The pivot-pin 1 will preferably be somewhat loosely fitted to thecross-head k in order that the cross-head may bear against thethrust-bearing provided in the compressionlink member while operating toforce the compression member forwardly. The great strain between thecompression and tension links is not, however, borne by any part of thishearing, the strain here being only that of the pressure exerted by theengine.

Bolts 10 10 and q q pass through the tensionlink members and are tapped,the former into the ends of the pivot-pin land the latter into thetrunnions n n of the frame at. These bolts operate solely to keep theparts together, no lateral or transverse strain being carried thereby.

I provide suitable bushings, as of phosphorbronze, between the linkmembers and between the tension link members and the frame-trunnions n.The link members are preferably all constructed of steel in order thatthey shall withstand the enormous strain put upon them,and thephosphor-bronze bushings provided between them form better wearingsurfaces than if two parts of the same material were in movable contactwith each other. I may in addition provide wroughtsteel bushings s, asshown, around the trunnions n, as these trunnions, being cast in onepiece with the yoke or frame a, will preferably be of cast-steel.

bearing-surface of the trunnions thereon of Y ample size to withstandthe heavy strain they are subjected to, while at the same time I amenabled to keep the size of the cross-head relatively small. This isadvantageous, for it is desirable to construct the cross-head andcompression-link of different materials in order that they may work welltogether, and as the phor-bronze. Phosphor-bronze being a costly metal,the small size of the cross-head is a factor in lowering the cost ofmanufacture.

ened materially by the web of metal which unites the otherwisebifurcated jaws and forms the thrust-bearings for the cross-head,

and the entire construction and combination of parts is one whichproduces a light and inexpensive structure, coupled with great strength,rigidity, and durability in operation.

It is obvious that modifications may be made in the details of theconstruction above described within the spirit and scope of myinvention.

What I claim, and desire to secure by Letters Patent, is

1. In a riveting-machine, the combination with a compression-link memberone end of which is in connection with a movable riveting-head, and theother end pivotally connected to the power member of an operatingengine,said link member having trunnions on opposite sides thereof and formedintegrally therewith, of two tension-link members, each pivotallysupported at one end upon one of the trunnions of the compressionlinkmember, and on the opposite end upon a stationary portion of the frame,substantially as set forth.

2. In a riveting-machine, the combination with a stationary yoke orframe, a stationary riveting-head thereon, a movable rivetingheadcarried thereby and an operating-engine, of a compression-link memberhaving a cut-away portion near one end thereof and a thrust-bearingcontiguous thereto, a crosshead mounted in the cut-away portion of thecompression-link member and adapted to engage the thrust-bearingtherein, a pivot-pin connecting the cross-head and the compression-linkmember together, said cross-head being also connected to thepower-transmitting mem ber of the operating-engine, and having trunnionson opposite sides thereof, and

. formed integrally therewith, and two tension- By constructing thecompression-link in the manner described I am enabled to make the I linkmembers, each pivotally supported at one end upon one of the trunnionsof the compression-link member, and at the opposite end upon astationary portion of the frame, substantially as set forth.

3. A compression-link member for a riveting-machine having a cut-awayportion near one end andathrust-bearingcontiguousthereto and formed in aweb which connects the otherwise bifurcated portion of the link memberstogether; and having trunnions formed integrally with the said linkmember. and projecting on opposite sides thereof, said trunnions adaptedto receive the ends of tension- I link members, substantially as setforth. The compressiondink member is strength- Signed at New York, N.Y., this 4th day of March, in the year 1901.

JOHN H. ALLEN. Witnesses:

HENRY D. WILLIAMS, JOSEPH N. FoLwELL, Jr.

